CN103710536A - Preparation method of pellet binder with high performance - Google Patents
Preparation method of pellet binder with high performance Download PDFInfo
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- CN103710536A CN103710536A CN201310753377.XA CN201310753377A CN103710536A CN 103710536 A CN103710536 A CN 103710536A CN 201310753377 A CN201310753377 A CN 201310753377A CN 103710536 A CN103710536 A CN 103710536A
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Abstract
The invention discloses a preparation method of a pellet binder with high performance, and belongs to the technical field of a metallurgy pellet binder. The method comprises the following steps: weighing 35-42 parts of bentonite, 5-8 parts of active lime, 2-4 parts of polyethylene glycol and 2-3 parts of polyester resin according to the mass ratio, evenly mixing to obtain a mixture A; weighing 1-2 parts of coal ash, 5-9 parts of agglomerate sieve residue and 1 part of zirconium oxide according to the mass ratio, evenly mixing with the mixture A, so as to obtain a mixture B; weighing 4-7 parts of starch, 1-3 parts of salt, 1-3 parts of polyurethane and 2-4 parts of phenolic resin according to the mass ratio, and evenly mixing to obtain a mixture C; evenly mixing the mixture B with the mixture C, so as to obtain the binder. By adopting the preparation method of the pellet binder with high performance, wastes of iron and steel enterprises are recycled, the burnt rate is low, the metallurgical performance of the pellet is improved, the grade of the charged ore is improved, the slag quantity of ironmaking and smelting by a blast furnace is reduced, and the fuel consumption is reduced. Therefore, the method has good economic benefits.
Description
Technical field
The present invention relates to metallurgical briquetting adhesive techniques field, more particularly, relate to a kind of preparation method of high performance pellet binder.
Background technology
Pellet is the product that pelletizing method obtains, that fine grinding concentrate is made to the lumpy material that can meet smelting iron and steel requirement, its process is: with iron ore concentrate or iron content powder, additive or the binding agent of fine grinding, prepare burden according to a certain percentage, mix, through pelletizer rolling pelletizing or balling press briquetting, become green-ball, then adopt dry, roasting or other method to make it to harden fixed.Pellet can obtain oxide pellet, cold bound pellets, metallic pellet etc. according to different methods, and wherein, the moulding of various pellets all be unable to do without binding agent.
At present, pellet has become one of main feed stock for blast furnace of steel industry, the Main Bottleneck that pellet quality and pellet cost Ye Shi iron and steel enterprise reduce costs.The binding agent that metallurgical briquetting is used is generally divided into two large classes: the one, and organic binder bond, the 2nd, inorganic adhesive.Organic binder bond, bond effect is good, and consumption is few, but its price is higher, apply immature, fine ore and pellet forming process are required to harshness, and organic binder bond is in intensification preheating and baking process, and the reactions such as oxygenolysis can occur, produce stress, destroy preheated pellets structure, cause pre-hot strength very low, so China's application is less.Mineral binder bond is mainly wilkinite, and part is used lime or other clay class binding agents, and bentonite adhesive application is ripe, and China's bentonite resource is abundant, and exploitation tooling cost is low, strong adaptability, controlled range are wide; But it burns, residual rate is high, and use wilkinite must cause the iron grade of feed stock for blast furnace to reduce as binding agent, and has increased the content of silicon, and the quantity of slag that blast furnace ironmaking is smelted is increased, and blast furnace coefficient declines, burnup rising.Therefore, be badly in need of seeking to meet pellet formation requirement, can reduce again the low residue binding agent of wilkinite add-on, thereby reduce, bring into ironmaking, harmful composition of making steel, improve the metallurgical performance of pellet, and smelt and provide better smeltings basic for the later stage.
Through patent retrieval, China Patent No.: ZL201110021863.3, Granted publication day: on July 4th, 2012, the name of innovation and creation is called: a kind of binding agent and preparation method, and as the application of metallurgical briquetting binding agent, it is comprised of following component: polyacrylamide, sodium humate, nitrate or oxymuriate or perchlorate mixture, W-Gum mixture, polyacrylamide sodium aluminate mixture one or both of combination, aforementioned binding agent joins 200 mesh sieve percent of pass and is not less than in 70% pelletizing iron fine powder and mixes, pelletizing, the add-on of binding agent is the 0.2-0.5% of iron fine powder.Although this application case has higher scaling loss, its production stage is complicated, and the compressive property of the green-ball of producing with this binding agent is poor, and the performance of this binding agent has much room for improvement, and not by metallurgical changing waste into resources application.
Summary of the invention
1. the technical problem that invention will solve
The object of the invention is to overcome in prior art, Using Metallurgical Solid Wastes is difficult to comprehensive utilization, the residual rate of burning of existing binding agent is high, have a strong impact on the grade into stove iron ore, and the poor deficiency of metallurgical performance of the pellet of producing, a kind of preparation method of high performance pellet binder is provided, this preparation method not only recycling Using Metallurgical Solid Wastes, and the cohesiveness of the binding agent of producing is strong, the consumption of binding agent is reduced, the grade that enters stove iron ore is improved, reduce and bring into ironmaking, make steel harmful composition, improve the integrated metallurgical performance of pellet.
2. technical scheme
For achieving the above object, technical scheme provided by the invention is:
The preparation method of a kind of high performance pellet binder of the present invention, the steps include:
(1) take in mass ratio wilkinite 35-42 part, quickened lime 5-8 part, polyoxyethylene glycol 2-4 part and vibrin 2-3 part, in stirrer for mixing, stir 25-30 minute, stirring velocity is 250r/min, mixes to obtain mixture A;
(2) take in mass ratio 1 part of flyash 1-2 part, agglomerate minus mesh 5-9 part and zirconium white, and flyash is become to median size in grinding machine for grinding respectively with agglomerate minus mesh is the powder of 42-74 micron, then flyash powder, agglomerate minus mesh powder, zirconium white are mixed with the mixture A that step (1) obtains, in stirrer for mixing, stir 35-45 minute, stirring velocity is 180r/min, mixes to obtain mixture B;
(3) take in mass ratio starch 4-7 part, salt 1-3 part, polyurethane(s) 1-3 part and resol 2-4 part, in stirrer for mixing, stir 20-25 minute, stirring velocity is 150r/min, mixes to obtain mixture C;
(4) mixture B step (2) being obtained mixes with the mixture C that step (3) obtains, and obtains binding agent after mixing.
Further, the median size of described flyash and agglomerate minus mesh is 42-74 micron.
Further, described vibrin is saturated polyester resin.
A kind of high performance pellet binder of the present invention, each component forms by following mass parts:
3. beneficial effect
Adopt technical scheme provided by the invention, compare with existing known technology, there is following unusual effect:
(1) preparation method of a kind of high performance pellet binder of the present invention, the binding agent that this preparation method produces has stronger cohesiveness, the consumption of binding agent is reduced, reduced bentonitic use, meanwhile, burn residual rate low, make to be improved into the grade of stove iron ore, reduced the quantity of slag that blast furnace ironmaking is smelted, burnup reduces;
(2) preparation method of a kind of high performance pellet binder of the present invention, the binding agent that this preparation method produces can directly apply to existing balling disc, does not need existing balling equipment to carry out technologic improvement, cost-saving;
(3) preparation method of a kind of high performance pellet binder of the present invention, this binding agent is by specific components proportioning, not only overcome the shortcoming that mineral binder bond reduces the grade of pellet, and reduced the detrimental impurity of bringing into, the metallurgical performance of pellet is improved;
(4) preparation method of a kind of high performance pellet binder of the present invention, this preparation method is simple and convenient, and the discarded flyash of metallurgy and agglomerate minus mesh are used as the component of binding agent, recycling Using Metallurgical Solid Wastes.
Embodiment
For further understanding content of the present invention, below in conjunction with embodiment, the invention will be further described.
Embodiment 1
A kind of high performance pellet binder of the present embodiment, its component and content are as follows: wilkinite 38kg, quickened lime 7kg, polyoxyethylene glycol 3kg, vibrin 3kg, flyash 1kg, agglomerate minus mesh 8kg, zirconium white 1kg, starch 5kg, salt 2kg, polyurethane(s) 2kg, resol 3kg.
What deserves to be explained is, above-mentioned quickened lime is called again soft calcined lime, be the lime that crystal grain is little, porosity is high, volume density is little obtaining in 1100 ℃ of left and right of calcining temperature, and the activity degree of the quickened lime that adopts of the present embodiment is more than 330ml/4N-HCl.
The polyoxyethylene glycol that a kind of high performance pellet binder of the present embodiment adopts is PEG-3000, and molecular weight is between 2700 to 3300, and fusing point is 51-53 ℃, is Off-white solid powder under normal temperature.Above-mentioned vibrin can be according to whether containing the unsaturated link(age) except phenyl ring in synthesis material, be divided into unsaturated polyester and saturated polyester, the vibrin of the present embodiment is 312C oil-free alkyd resin, and this 312C oil-free alkyd resin is high molecular line style saturated polyester resin.
Above-mentioned flyash is that before induced draft fan enters atmosphere by coal-fired flue-gas, chilling is the particulate of vitreum state, through fly-ash separator, and the particulate separated, collection obtains, the quality percentage composition of this flyash composition is: SiO
2: 45.5%, Al
2o
3: 29.6%, Fe
2o
3: 9.2%, CaO:6.5%, MgO:3.6%, Na
2o+K
2o:2.5%, all the other impurity: 3.1%; In addition, in blast furnace production process, if it is too thin to enter furnace charge thing granularity, resistance is large, and permeability of stock column is poor, affects smooth operation of furnace, therefore must be by sieving to control the granularity into stove material, agglomerate minus mesh of the present invention, is agglomerate and enters fines under stove sieve before.
Above-mentioned starch is the mixture of yam starch, esterification starch and wheat starch, wherein the quality percentage composition of each component is: yam starch: 38.5%, esterification starch: 24%, wheat starch: 37.5%, and the percent of pass that yam starch, esterification starch and wheat starch join 200 mesh sieves is 75%.
Above-mentioned resol is lacquer resins, and it is under an acidic catalyst exists, a kind of novolac resin being made by excessive phenol and formaldehyde condensation polymer.
The preparation method of a kind of high performance pellet binder of the present embodiment, its step is as follows:
(1) take in mass ratio wilkinite 38kg, quickened lime 7kg, polyoxyethylene glycol 3kg and vibrin 3kg, in stirrer for mixing, stir 28 minutes, stirring velocity is 250r/min, mixes to obtain mixture A;
(2) take in mass ratio flyash 1kg, agglomerate minus mesh 8kg and zirconium white 1kg, and flyash is become to median size in grinding machine for grinding respectively with agglomerate minus mesh is the powder of 42-74 micron, then flyash powder, agglomerate minus mesh powder, zirconium white are mixed with the mixture A that step (1) obtains, in stirrer for mixing, stir 40 minutes, stirring velocity is 180r/min, mixes to obtain mixture B;
(3) take in mass ratio starch 5kg, salt 2kg, polyurethane(s) 2kg and resol 3kg, in stirrer for mixing, stir 22 minutes, stirring velocity is 150r/min, mixes to obtain mixture C;
(4) mixture B step (2) being obtained mixes with the mixture C that step (3) obtains, and obtains binding agent after mixing.
Embodiment 2
A kind of high performance pellet binder of the present embodiment, its substance is with embodiment 1, and difference is: each component and content are as follows: wilkinite 35kg, quickened lime 5kg, polyoxyethylene glycol 2kg, vibrin 2kg, flyash 1kg, agglomerate minus mesh 5kg, zirconium white 1kg, starch 4kg, salt 1kg, polyurethane(s) 1kg, resol 2kg.
The preparation method of a kind of high performance pellet binder of the present embodiment, its step is as follows:
(1) take in mass ratio wilkinite 35kg, quickened lime 5kg, polyoxyethylene glycol 2kg and vibrin 2kg, in stirrer for mixing, stir 25 minutes, stirring velocity is 250r/min, mixes to obtain mixture A;
(2) take in mass ratio flyash 1kg, agglomerate minus mesh 5kg and zirconium white 1kg, and flyash is become to median size in grinding machine for grinding respectively with agglomerate minus mesh is the powder of 42-74 micron, then flyash powder, agglomerate minus mesh powder, zirconium white are mixed with the mixture A that step (1) obtains, in stirrer for mixing, stir 35 minutes, stirring velocity is 180r/min, mixes to obtain mixture B;
(3) take in mass ratio starch 4kg, salt 1kg, polyurethane(s) 1kg and resol 2kg, in stirrer for mixing, stir 20 minutes, stirring velocity is 150r/min, mixes to obtain mixture C;
(4) mixture B step (2) being obtained mixes with the mixture C that step (3) obtains, and obtains binding agent after mixing.
Embodiment 3
A kind of high performance pellet binder of the present embodiment, its substance is with embodiment 1, and difference is: each component and content are as follows: wilkinite 42kg, quickened lime 8kg, polyoxyethylene glycol 4kg, vibrin 3kg, flyash 2kg, agglomerate minus mesh 9kg, zirconium white 1kg, starch 7kg, salt 3kg, polyurethane(s) 3kg, resol 4kg.
The preparation method of a kind of high performance pellet binder of the present embodiment, its step is as follows:
(1) take in mass ratio wilkinite 42kg, quickened lime 8kg, polyoxyethylene glycol 4kg and vibrin 3kg, in stirrer for mixing, stir 30 minutes, stirring velocity is 250r/min, mixes to obtain mixture A;
(2) take in mass ratio flyash 2kg, agglomerate minus mesh 9kg and zirconium white 1kg, and flyash is become to median size in grinding machine for grinding respectively with agglomerate minus mesh is the powder of 42-74 micron, then flyash powder, agglomerate minus mesh powder, zirconium white are mixed with the mixture A that step (1) obtains, in stirrer for mixing, stir 45 minutes, stirring velocity is 180r/min, mixes to obtain mixture B;
(3) take in mass ratio starch 7kg, salt 3kg, polyurethane(s) 3kg and resol 4kg, in stirrer for mixing, stir 25 minutes, stirring velocity is 150r/min, mixes to obtain mixture C;
(4) mixture B step (2) being obtained mixes with the mixture C that step (3) obtains, and obtains binding agent after mixing.
In embodiment 1～3, by the prepared pellet binder of above-mentioned preparation method, should keep sealing, otherwise, should in 48 hours, use.During use, the add-on of binding agent is 1.1% of fine ore quality, with mixing equipment, be mixed into compound, then add in balling disc, on balling disc, in the mixture of fine ore and binding agent, spray water, after binding agent water suction, become clay, under the effect of balling disc rolling machine power, " clay " in agglomerate be the row of squeezing from inside to outside, mixed powder to bonding fine ore behind pelletizing surface and binding agent, so the repeated multiple times ball that makes is grown up, until form qualified pelletizing, discharges balling disc, just obtains green pellets.Moulding green pellets is transported to shaft furnace and carries out high-temperature roasting, obtain qualified ripe pelletizing.
Green pellets and the ripe pelletizing respectively the binding agent in embodiment 1～3 produced carry out Performance Detection, and table 1 is the pelletizing of producing and the performance index contrast of applying the pelletizing of wilkinite production of the binding agent in Application Example 1～3.
The pelletizing that binding agent in table 1 embodiment 1～3 is produced contrasts with the performance index of the pelletizing that application wilkinite is produced
Performance index by his-and-hers watches 1 contrast, and can find, apply the performance index of the pellet that the ripe ball ultimate compression strength of shatter strength of green pellet, ultimate compression strength and finished product of the pellet that binding agent of the present invention produces all produces over common bentonite adhesive.
The binding agent of this reality invention has stronger cohesiveness, the consumption of binding agent is reduced, and the add-on of the binding agent of the present embodiment is 1.1% of fine ore quality, and while utilizing wilkinite to make binding agent, bentonitic add-on is 2% left and right of fine ore quality, has reduced the consumption of binding agent; Meanwhile, it is low that the binding agent of the present embodiment burns residual rate, makes to be improved into the grade of stove iron ore, reduced the quantity of slag that blast furnace ironmaking is smelted, and burnup reduces.In addition, binding agent of the present invention can directly apply to existing balling disc, does not need the balling disc to having now to carry out technologic improvement, cost-saving, has broad application prospects.
Claims (3)
1. a preparation method for high performance pellet binder, the steps include:
(1) take in mass ratio wilkinite 35-42 part, quickened lime 5-8 part, polyoxyethylene glycol 2-4 part and vibrin 2-3 part, in stirrer for mixing, stir 25-30 minute, stirring velocity is 250r/min, mixes to obtain mixture A;
(2) take in mass ratio 1 part of flyash 1-2 part, agglomerate minus mesh 5-9 part and zirconium white, and flyash is become to median size in grinding machine for grinding respectively with agglomerate minus mesh is the powder of 42-74 micron, then flyash powder, agglomerate minus mesh powder, zirconium white are mixed with the mixture A that step (1) obtains, in stirrer for mixing, stir 35-45 minute, stirring velocity is 180r/min, mixes to obtain mixture B;
(3) take in mass ratio starch 4-7 part, salt 1-3 part, polyurethane(s) 1-3 part and resol 2-4 part, in stirrer for mixing, stir 20-25 minute, stirring velocity is 150r/min, mixes to obtain mixture C;
(4) mixture B step (2) being obtained mixes with the mixture C that step (3) obtains, and obtains binding agent after mixing.
2. the preparation method of a kind of high performance pellet binder according to claim 1, is characterized in that: it is 42-74 micron that described powder does not have the median size of ash and agglomerate minus mesh.
3. according to the preparation method of a kind of high performance pellet binder described in claim 2 or 3, it is characterized in that: described vibrin is saturated polyester resin.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104195329A (en) * | 2014-08-21 | 2014-12-10 | 东北大学 | Preparation method of magnesite powder briquetting binding agent |
| CN105838875A (en) * | 2016-06-05 | 2016-08-10 | 扬州派德粉末冶金有限公司 | Adhesion agent for metallurgy |
| CN106702151A (en) * | 2017-03-11 | 2017-05-24 | 重庆臻焱节能环保科技有限公司 | Compound adhesive for cold-pressed pellets and preparation method of compound adhesive |
| CN109706314A (en) * | 2019-01-12 | 2019-05-03 | 王金华 | A kind of residual explosion-proof metallurgical briquetting binder of low fever |
| CN111826140A (en) * | 2020-08-05 | 2020-10-27 | 淄博金藏新材料科技有限公司 | Special strong adhesive for bentonite and use method thereof |
| CN116043012A (en) * | 2023-04-03 | 2023-05-02 | 唐山金沙燃烧热能股份有限公司 | Sintering-free cold-bonded pellet for blast furnace and binder |
| CN117947264A (en) * | 2024-03-27 | 2024-04-30 | 秦皇岛贝特化工科技有限公司 | High-temperature-resistant binder for metallized pellets |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103602804A (en) * | 2013-12-09 | 2014-02-26 | 安徽工业大学 | High-performance pellet adhesive |
-
2013
- 2013-12-30 CN CN201310753377.XA patent/CN103710536A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103602804A (en) * | 2013-12-09 | 2014-02-26 | 安徽工业大学 | High-performance pellet adhesive |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104195329A (en) * | 2014-08-21 | 2014-12-10 | 东北大学 | Preparation method of magnesite powder briquetting binding agent |
| CN105838875A (en) * | 2016-06-05 | 2016-08-10 | 扬州派德粉末冶金有限公司 | Adhesion agent for metallurgy |
| CN106702151A (en) * | 2017-03-11 | 2017-05-24 | 重庆臻焱节能环保科技有限公司 | Compound adhesive for cold-pressed pellets and preparation method of compound adhesive |
| CN109706314A (en) * | 2019-01-12 | 2019-05-03 | 王金华 | A kind of residual explosion-proof metallurgical briquetting binder of low fever |
| CN111826140A (en) * | 2020-08-05 | 2020-10-27 | 淄博金藏新材料科技有限公司 | Special strong adhesive for bentonite and use method thereof |
| CN116043012A (en) * | 2023-04-03 | 2023-05-02 | 唐山金沙燃烧热能股份有限公司 | Sintering-free cold-bonded pellet for blast furnace and binder |
| CN116043012B (en) * | 2023-04-03 | 2023-06-02 | 唐山金沙燃烧热能股份有限公司 | Sintering-free cold-bonded pellet for blast furnace and binder |
| CN117947264A (en) * | 2024-03-27 | 2024-04-30 | 秦皇岛贝特化工科技有限公司 | High-temperature-resistant binder for metallized pellets |
| CN117947264B (en) * | 2024-03-27 | 2024-07-19 | 秦皇岛贝特化工科技有限公司 | High-temperature-resistant binder for metallized pellets |
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Application publication date: 20140409 |